You still haven't mentioned a budget but by the choices you're making it looks like a low budget. If that's the case, you're not going to come away with a "true" custom and you're still going to spend a lot of money to get things "right". There is no such thing as an excellent quality, cheap, custom rifle unless you have access to a lot of used components that people want to get rid of.
You also haven't mentioned intended use very much. You've said it will be for hunting, but are you hunting in eastern hardwoods from a stand or are you stalking the rocky mountains or are you on the Kansas plains? I may have missed it, but what are you hunting? I'm not trying to be a jerk, but it sounds like you like the idea of building a custom rifle, but haven't done any homework or put much thought into it.
When I built the custom rifle for my son, I have a couple of pages of notes of just thoughts before I ever bought the first component. I looked at actions, barrels, triggers and stocks before I ever paid the first dollar. I kept the entire file to pass on to him with the rifle. Since I live in Tennessee and because I wanted the rifle to be good for several different things rather than specialize, I ended up with a Defiance action, Krieger barrel, H&S pillar bedded stock, tuned Timney trigger and a Tract Toric 3-15 power scope. All of the metal is stainless with the fluting being cerakoted for appearance. To prove that it is FULL custom, the serial number is his initials and birthdate. It's heavy for a rifle to carry (9.5 lbs), but handles and balances VERY well with a 22" barrel and is chambered in 7mm-08. I know it's not a "custom" type caliber, but it can be loaded down while he's relatively small and loaded up later when he's able to handle more. The barrel is also threaded for a suppressor. For now, it's primarily a hunting type rifle, but with a couple of the components as the base, he can change things to go a different direction like long range/precision if he wishes with different components in the future.
My recommendation would be to think A LOT first, save money because it won't be cheap and do a lot of research before you ever buy the first thing. A lot of the fun for me was doing the research and learning.